Improvement in cultivators



' 1.. A. PALMER 7 Wheel-Cultivator. a No. 68,784. Patented Sept-[10,1861

UNITED STATES PATENT OFFICE.

IRA A. PALMER, MONMOUTH, ILLINOIS.

IMPROVEMENT IN CULTIVATORS.

Specification forming part of Letters Patent No. 68,784, dated September 10, 1867.

the whole machine, and Fig. 2 a perspective View of the joint for attaching plows to the main frame.

My invention relates to the peculiar construction of the main frame, by which it is made to balance when in use, or when the plows are swung up; also, to the manner of attaching the plow-beams to the main frame, and the device for regulating the height of plows when swung at will.

To enable others skilled in the art to make and use my invention, 1 proceed to the following fuller description.

The main frame I form of the pieces 0 and D, the piece Gstanding vertical, and D placed at any suitable angle to it, and bearing the spin dles for the wheels, on which all are mounted at their lower ends. The piecesG and D, I connect at the top by the cross-pieces, A A, and thelongitudinal pieces B B, extending B B back from the main frame sufficient to hook up the plows on when not in use or moving, as seen at Fig. 1, by the left-hand plow. This construction of frame throws the weight of the entire frame forward of the wheels, so that when in use the draft at the point F and the draw on the shovels s just balance the whole and prevent the tongue throwing up at the forward end, and when the plows are both swung by the book 2 they balance the weight forward when not in use.

The plows I attach near the lower end of frame by the device seen at Fig. 2.

The jaws P P are arranged with a series of holes, to w w, for side adjustment, and with semicircular bearings S S S, corresponding with said holes. These bearings receive the strain on the cross-knuckle when in use and take all strain entirely off of the pin 1.

The plates T, one of which is seen at Fig. 2, I use on the end of the plow-beams. These plates T, I construct with flanges to engage the beams,and with socket to receive the knuckle TI!- The knuckle p" r I construct with the crosspiece 7' nearer one end than the other of the vertical piece 1)", so that by inverting it I procure a vertical adjustment of the plow-beams. This construction of knuckle, it will be seen, with the attachment, furnishes a durable, cheap, and solid joint, and one which will hold the plows steady, not allowing them to turn or roll, at the same time allowing perfect freedom in both lateral and vertical movement on the pins a and I, which pass through the jaws P and knuckle Wp.

The hook z is provided with a screw, by which to shorten or lengthen the same above the beam to enable the plowman to swing his plows higher or lower at pleasure.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. The construction of the frame A D G B substantially as described, and for the purpose set forth. r

2. The adjustable hook z as arranged, and for the purpose described.

3. The jaws P P, knuckle W1), adjustable pins a l, and plates T, constructed and arranged as described, and for the purpose set forth.

IRA A. PALMER.

Witnesses:

W. B. RICHARDS, M. L. SHAW. 

